反应详情

Following the same procedure described in Example 1, Part C, but substituting 29.0 gm. (0.0915 mole) of 2-carbomethoxy-4-(3,4-dimethoxyphenyl)-4-cyanocyclohexanone (prepared in Part B, above) for the 29.8 gm. of 2-carbomethoxy-4-(p-chlorophenyl)-4-cyanocyclohexanone, using 600 ml. acetic acid and 300 ml. 10 percent aqueous sulfuric acid instead of the 660 ml. and 330 ml., respectively, heating on the steam bath for 48 hours instead of 24 hours, and recrystallizing from a mixture of ethyl acetate and hexane instead of diethyl ether, there is obtained 16.83 gm. (67% yield) of the desired 4-cyano-4-(3,4-dimethoxyphenyl)cyclohexanone which has a melting point at 112.5° to 114.5° C.

1. temperature, respectively, heating on the steam bath for 48 hours instead of 24 hours
2. customrecrystallizing from a mixture of ethyl acetate and hexane instead of diethyl ether
3. customthere is obtained 16.83 gm